A spring scale reads 20 N as it pulls a 4 kilogram box across a table. What is the magnitude of the force exerted by the mass on the spring scale, if the frictional force is assumed to be equal to zero?

Frank does 2400J of work in climbing a set of stairs. If he does the work in 6 seconds, what is his power output?

Simon puts new batteries in his radio-controlled car and its controller. He activates the controller, which sends a radio signal to the car. The car moves forward. Name at least three energy transformations that occurred.

A spring is stretched 175 mm by an 8-kg block. the block is displaced 100 mm downward from its equilibrium position and given a downward velocity of 1.50 m/s. assume that positive displacement y is downward.

A student used a yardstick to model elastic rebound. The student bent the stick without breaking it and then let the stock go. What does the bent stick represent in the student's model? A. The Rock's original shape B. A siesmic wave C.

What force is required to accelerated a body with a mass of 15 kilograms at a rate of 8 m/s2

This should be correct

A sound wave is produced when a medium begins to blank.

What is the instantaneous velocity of a freely falling object 12 s after it is released from a position of rest?

A car's position in relation to time is plotted on the graph. What is the car's average velocity for segment C? A) - 4 m/s B) - 0.25 m/s C) 0.25 m/s D) 4 m/s

What is impossible for a machine to do? A) do a greater amount of work than the amount of work done on the machine B) apply a force in a direction that is different than the direction of the force applied to the machine C) move an object a greater